what does the semikolon mean at the begining of this function?

Question

what kind of code is that? what does the semikolon mean at the begining of this function?

;(function ( $, window, document, undefined )

what is the purpose to write function like that?

creatorHashChanged: function(event) {}

what does "extend" mean here ?

$.extend( {}, defaults, options );

The complete code:

;(function ( $, window, document, undefined ) {

   function Plugin( options ) {
    this.options = $.extend( {}, defaults, options );

    this._defaults = defaults;
    this._name = pluginName;
    this._tour = defaults.tour;

    if(this.options.delete) this.tourdate_delete(true);
    else this.init();
  }


  Plugin.prototype = {

    init: function() {

    },

    creatorHashChanged: function(event) {

    },

    exitCreator: function() {

    },


})( jQuery, window, document );

Check this: http://stackoverflow.com/questions/7365172/semicolon-before-self-invoking-function — MaxGyver, Oct 12 '14 at 18:49
Regarding `$.extend`, have a look at the documentation: https://api.jquery.com/jquery.extend/ — Felix Kling, Oct 12 '14 at 18:53

score 1 · Accepted Answer · answered Oct 12 '14 at 18:51

It is do the same function semicolon at the end. I think it writed this way to prevent errors when script will be minimized.

what is the purpose to write function like that?

To catch events

what does "extend" mean here ?

Merge to object in one. Take a look at jquery docs.

what does the semikolon mean at the begining of this function?

1 Answers1